How much work does a person do when riding a bicycle up a hill?Where does that energy come from?

A paper about skyscraper with horizontal wind from a chapter in the book attached. Asking a question about skyscrapers with horizontal wind?

Answer two questions:

1) How much work does a person do when riding a bicycle up a hill?

and

2) Where does that energy come from?

We learned that gravity is a conservative force, so it has an associated potential energy but evidently
cannot change the total mechanical energy of this system.

On the other hand, friction between the tire and 20 mins for the book

Here is a link to the book –

https://we.tl/t-8tGhqjf1Gv

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